# X-pack
**URL:** https://discuss.elastic.co/t/x-pack/64453
**Category:** Elasticsearch
**Created:** [October 31, 2016, 2:11pm UTC](https://discuss.elastic.co/t/x-pack/64453 "2016-10-31T14:11:10Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@lianst](https://discuss.elastic.co/u/lianst)
#### Post date: [October 31, 2016, 2:11pm UTC](https://discuss.elastic.co/t/x-pack/64453/1 "2016-10-31T14:11:10Z")
I installed the x-pack after the start Elasticsearch suggest the following error, ask you how to solve?
[2016-10-31T21:54:07,380][WARN][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: ElasticsearchException[Failed to load plugin class [org.elasticsearch.xpack.XPackPlugin]]; nested: InvocationTargetException; nested: ElasticsearchException[failed to initialize a TrustManagerFactory]; nested: ProviderException[Error parsing configuration]; nested: ConfigurationException[Unexpected value Token['@'], line 2];
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:116) ~[elasticsearch-5.0.0.jar:5.0.0]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:103) ~[elasticsearch-5.0.0.jar:5.0.0]
at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54) ~[elasticsearch-5.0.0.jar:5.0.0]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:96) ~[elasticsearch-5.0.0.jar:5.0.0]
at org.elasticsearch.cli.Command.main(Command.java:62) ~[elasticsearch-5.0.0.jar:5.0.0]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:80) ~[elasticsearch-5.0.0.jar:5.0.0]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:73) ~[elasticsearch-5.0.0.jar:5.0.0]
Caused by: org.elasticsearch.ElasticsearchException: Failed to load plugin class [org.elasticsearch.xpack.XPackPlugin]
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### Author:  [@spinscale](https://discuss.elastic.co/u/spinscale)
#### Post date: [October 31, 2016, 2:34pm UTC](https://discuss.elastic.co/t/x-pack/64453/2 "2016-10-31T14:34:54Z")
Hey,
can you provide some more information?
- Which Elasticsearch version is this?
- Which java version is this?
- Can you share your configuration file, the `elasticsearch.yml`
- Did you change any other default configuration?
--Alex
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### Author:  [@lianst](https://discuss.elastic.co/u/lianst)
#### Post date: [October 31, 2016, 2:46pm UTC](https://discuss.elastic.co/t/x-pack/64453/3 "2016-10-31T14:46:50Z")
Elasticsearch version : Version: 5.0.0, Build: 253032b/2016-10-26T04:37:51.531Z,
java version:JVM: 1.8.0\_111
elasticsearch.yml(Only the following two options have been modified) :
path.data: /data
network.host: 10.10.174.223
No other default configuration files have been modified
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### Author:  [@spinscale](https://discuss.elastic.co/u/spinscale)
#### Post date: [November 2, 2016, 11:55am UTC](https://discuss.elastic.co/t/x-pack/64453/4 "2016-11-02T11:55:25Z")
Hey,
so this looks as if there is an error with the security manager and the config file that is being loaded.
- Which operating system is this?
- Did you change anything in `plugins/x-pack`?
- Can you show the contents of `plugins/x-pack/plugin-security.policy`
- Can you reinstall the `x-pack` plugin?
- Can you paste the full output `java -version`?
--Alex
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### Author:  [@spinscale](https://discuss.elastic.co/u/spinscale)
#### Post date: [November 2, 2016, 12:09pm UTC](https://discuss.elastic.co/t/x-pack/64453/5 "2016-11-02T12:09:37Z")
Also, the output of `/bin/elasticsearch-plugin install x-pack` would be nice to see
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### Author:  [@FardinBehboudi](https://discuss.elastic.co/u/FardinBehboudi)
#### Post date: [January 26, 2017, 1:59pm UTC](https://discuss.elastic.co/t/x-pack/64453/6 "2017-01-26T13:59:10Z")
i have also this problem:
i am using Elastic stack 5.1 i had elasticsearcha nd kibana installed with xpack installed on themPreformatted text and they were working also i installed logstash and beats.(order of installation was like what i wrote) after installing beat(i think) and some changes in my company VPN and proxy. my elasticsaerch andkibana stopped working, the service is not even getting start. i remove x-pack then the ES and kibana working but again when i install x-pack ES and kibana Stop. what should I do?
the log says teh xpack plugin cant load!
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### Author:  [@TimV](https://discuss.elastic.co/u/TimV)
#### Post date: [January 27, 2017, 2:31am UTC](https://discuss.elastic.co/t/x-pack/64453/7 "2017-01-27T02:31:27Z")
> [@FardinBehboudi](#):
>
> what should I do?
Please start a new discussion thread, and post details of what steps you have taken, and the exact error message(s) from the logs.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 1:40pm UTC](https://discuss.elastic.co/t/x-pack/64453/8 "2017-07-06T13:40:02Z")